Irreducible Characteristic Cycles for Orbit Closures of a Symmetric Subgroup

William Graham, Minyoung Jeon, Scott Joseph Larson

Let $G=GL(n)$ and $K=GL(p)\times GL(q)$ with $p+q=n$, where the groups are taken over $\C$. In this paper we study a certain family of $K$-orbit closures on the flag variety $…